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[Special Note] Applicable version: mybatis-plus-generator 3.5.1 and below

1. Create a Springboot project

In the previous IDEA column, there is already an article [Create a Springboot project] , so I won’t explain it separately.
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2. Import related dependencies

Open pom.xml and fill in the following dependencies

<dependency>
    <groupId>com.baomidou</groupId>
     <artifactId>mybatis-plus-boot-starter</artifactId>
     <version>3.4.1</version>
 </dependency>
 <dependency>
     <groupId>com.baomidou</groupId>
     <artifactId>mybatis-plus-generator</artifactId>
     <version>3.4.1</version>
 </dependency>
 <dependency>
     <groupId>org.freemarker</groupId>
     <artifactId>freemarker</artifactId>
     <version>2.3.30</version>
 </dependency>
 <dependency>
     <groupId>org.projectlombok</groupId>
     <artifactId>lombok</artifactId>
     <version>1.18.6</version>
 </dependency>

3. Pull code generator code

Go directly to the [official website pull code]
attention:

The path in the global configuration
Data source configuration
Module configuration in package configuration (the default configuration can also be modified)

 pc.setParent("com.wms")
            .setEntity("entity")
            .setMapper("mapper")
            .setService("service")
            .setServiceImpl("service.impl")
            .setController("controller");

The parent class in the policy configuration can be deleted

Fourth, configure the database connection yml


server:
  port: 8090

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/ming?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: root


Logging:
  level:
    com.wms: debug

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Five, create a table

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `no` varchar(20) DEFAULT NULL COMMENT '账号',
  `name` varchar(100) NOT NULL COMMENT '名字',
  `password` varchar(20) NOT NULL COMMENT '密码',
  `age` int(11) DEFAULT NULL,
  `sex` int(11) DEFAULT NULL COMMENT '性别',
  `phone` varchar(20) DEFAULT NULL COMMENT '电话',
  `role_id` int(11) DEFAULT NULL COMMENT '角色 0超级管理员，1管理员，2普通账号',
  `isValid` varchar(4) DEFAULT 'Y' COMMENT '是否有效，Y有效，其他无效',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

6. Generate code

Right-click the code generator class, click Execute, and enter the corresponding table name in the terminal console
After typing, press the Enter key, the effect is as follows
The code is generated as follows, and the corresponding controller, entity, mapper, service, and serviceImpl codes are automatically generated for us.

Seven, write test code to run

Modify UserController code

package com.springboot.demo.controller;
import com.springboot.demo.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author 明哥
 * @since 2022-10-30
 */
@RestController
@RequestMapping("/user")
public class UserController {
    
    

    @Autowired
    private IUserService userService;

    @GetMapping("listAll")
    public List listAll(){
    
    
        return userService.list();
    }
}

Check if UserMapper is missing an annotation
start service
Browser verification
Input address: http://localhost:8090/user/listAll
Try inserting a piece of data into the database

summary

This section summarizes "Using the MybatisPlus Code Generator to Generate Back-End Code", I hope it can be helpful to everyone, please help [Like] + [ Favorite ] , if you are interested in learning Java and front-end with Xiao Ming , [Follow a wave] Don't get lost.
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